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Current Sampling patents

      

This page is updated frequently with new Current Sampling-related patent applications.

Slow-disk detection method and apparatus
A slow-disk detection method is disclosed, the method includes: periodically performing sampling in a detection period; each time sampling is performed, obtaining a first delay of data reading or writing that is performed on a hard disk in current sampling, and a first-delay-related indicator value; determining a first range to which the first-delay-related indicator value belongs; and if the first range is full, calculating a first ratio of the first delay to an average delay in a range; and each time after one detection period ends and before a next detection period starts, if a quantity of all delay-related indicator values fall within all full ranges is greater than or equal to a second threshold, calculating an average value of first ratios; and if the average value of the first ratios is greater than or equal to a third threshold, determining that the hard disk is a slow disk.. .
Huawei Technologies Co., Ltd.


Constant current power supply with a plurality of current outputs for led lamps
A constant current power supply with a plurality of current outputs for led lamps includes a dc/dc control module, an overvoltage detection circuit, a current sampling resistor, at least one output current conversion circuit and at least one overvoltage protection resistor. The output current conversion circuit includes a switch, a mos transistor with a grid electrode electrically connected to the switch, and a current conversion sampling resistor.
Wanjiong Lin


Power amplifier output power control circuit
A power amplifier output power control circuit includes a first operational amplifier with a negative input terminal configured to receive a power control signal; a first pmos transistor with a grid electrode connected to an output terminal of the first operational amplifier, a source electrode connected to an external power source, and a drain electrode grounded via a voltage dividing network; a power amplifier with a power end connected to the drain electrode of the first pmos transistor, an input terminal configured to access to a signal to be amplified, and an output terminal configured to amplify the signal; and a current sampling circuit configured to produce sampling current after sampling current across the first pmos transistor and providing a negative feedback signal for the positive input terminal of the first operational amplifier according to the sampling current such that total output power of the power amplifier keeps unchanged.. .
Lansus Technologies Inc.


Charging system and charging terminal and power adapter
A charging system, a charge method, and a power adapter are provided. The charging system includes a battery, a first rectifying circuit, a switch circuit, a transformer, a second rectifying circuit, a sampling circuit, and a control circuit.
Guangdong Oppo Mobile Telecommunications Corp., Ltd.


Charging system and charging method, and power adapter
The present disclosure discloses a charging system, a charging method, and a power adapter. The charging system includes a battery, a first rectifier, a switch unit, a transformer, a second rectifier, a sampling unit, and a control unit.
Guangdong Oppo Mobile Telecommunications Corp., Ltd.


Current sampling and processing device and an inverter
The present invention provides current sampling and processing device and method for an inverter, wherein said method comprises: setting initialization parameters during initial start-up of the current sampling and processing process and subsequently enabling a pulse width modulation counter; triggering and implementing a current sampling operation when the value of the pulse width modulation counter equals to the value of the second comparison and matching parameter; calculating a value of a new first comparison and matching parameter based on the sampled current value and then actually updating the value of the first comparison and matching parameter into the calculated value of the new first comparison and matching parameter in the immediately following overflow or underflow time; outputting a voltage corresponding to the updated value of the first comparison and matching parameter to control on and off of a circuit device when the updated value of the first comparison and matching parameter equals to the value of the pulse width modulation counter. The device and method disclosed in the present invention have a short delay time..
Nio Nextev Limited


Charging system and charging terminal and power adapter
A charging system for a terminal, a charge method, and a power adapter are provided. The charging system includes a power adapter and a terminal.
Guangdong Oppo Mobile Telecommunications Corp., Ltd.


Peak current servo
The proposed disclosure combines peak-mode monitoring with valley-mode control, in a buck switching converter, by means of a peak-current sampling circuit, not to turn the high side device off, but to control a slow loop, which in turn controls a variable offset incorporated into the loop control current. This helps the loop control current define the exact peak current, regardless of what other offsets, compensation ramp or peak-to-peak current ripple, are applied to the loop control current.
Dialog Semiconductor (uk) Limited


Charging system and method, and power adapter
The present disclosure discloses a charging system and method, and a power adapter. The system includes a power adapter and a terminal.
Guangdong Oppo Mobile Telecommunications Corp., Ltd.


Power factor correction device and controlling method thereof, and electronic device
Pfc device and controlling method thereof, and an electronic device are provided. The device includes: first and second input terminals configured to receive ac input signal including alternating positive and negative half-cycles; an output terminal configured to provide output signal; an inductor a first terminal of which is coupled with the first input terminal; a first bridge arm including first and second switch components whose first connection point is coupled with second terminal of the inductor; a second bridge arm including third and fourth switch components whose second connection point is coupled with the second input terminal; a first current sampling unit configured to sample falling edge of an inductor current flowing through the inductor; a switch controlling unit configured to generate switch control signal based on sampling result to control the first and second switch components to change switch status.
Murata Manufacturing Co., Ltd.


Charging system and charging method, and power adapter

The present disclosure discloses a charging system, a charging method and a power adapter. The system includes a battery, a first rectifier, a switch unit, a transformer, a compositing unit, a sampling unit, and a control unit.
Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Current sampling and holding circuit and signal acquisition system

A current sampling and holding circuit is disclosed. The current sampling and holding circuit includes: a canceling circuit, connected in series between a vdd terminal and a current sensor, being conducted according to a first enable signal, and configured to output a current to cancel a direct-current component in the current sensor; and a mirroring circuit, connected in parallel between the vdd terminal and a ground voltage with the canceling circuit and the current sensor connected in series, and being conducted according to a second enable signal inverse to the first enable signal, and configured to perform current transfer according to a current difference between a mirror current of a shunt current and an output current of the current sensor.
Shenzhen Goodix Technology Co., Ltd.

Charging system and charging method, and power adapter

The present disclosure discloses a charging system, a charging method and a power adapter. The system includes a battery, a first rectifier, a switch unit, a transformer, a compositing unit, a sampling unit, and a control unit.
Guangdong Oppo Mobile Telecommunications Corp., Lt D.

Charging system and method, and power adapter

The present disclosure discloses a charging system and method, and a power adapter. The system includes a power adapter and a terminal.
Guangdong Oppo Mobile Telecommunications Corp., Lt D.

Charging system, charging method, and power adapter

A charging system, a charging method, and a power adapter are provided. The power adapter includes a first rectification unit, a switch unit, a transformer, a second rectification unit, a first charging interface, a sampling unit, a control unit, a second charging interface, and a battery coupled to the second charging interface.
Guangdong Oppo Mobile Telecommunications Corp, Ltd

Charging system, charging method, and power adapter

A charging system, a charging method, and a power adapter are provided. The power adapter includes a first rectification unit, a switch unit, a transformer, a second rectification unit, a first charging interface, a sampling unit, and a control unit.
Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Charging system, charging method, and power adapter

A charging system, a charging method, and a power adapter are provided. The power adapter includes a first rectification unit, a switch unit, a transformer, a second rectification unit, a first charging interface, a sampling unit, and a control unit.
Guangdong Oppo Mobile Telecommunications Corp, Ltd

Charging system, charging method, and power adapter

A charging system, a charging method and a power adapter are provided. The power adapter includes a first rectification unit, a switch unit, a transformer, a second rectification unit, a first charging interface, a sampling unit, and a control unit.
Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Charging system and charging method, and power adapter

The present disclosure discloses a charging system and a charging method and a power adapter. The system includes a battery, a first rectifier, a switch unit, a transformer, a second rectifier, a sampling unit and a control unit.
Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Warning obstacles and device of obstacles

An obstacle warning method includes the steps of: acquiring scenario images at a current sampling time and a previous sampling time, and a map about first relative distances between respective viewing points in a viewing field and a vehicle; acquiring a profile and marking information of an obstacle and a map about a second relative distance between the obstacle and the vehicle in accordance with the map about the first relative distances; calculating a map about a third relative distance between the obstacle and the vehicle at a previous sampling time in accordance with the map about the first relative distances at the previous sampling time, the profile and the marking information of the obstacle at the current sampling time and a motion vector of the obstacle from the current sampling time to the previous sampling time.. .
Beijing Smarter Eye Technology Co. Ltd.

Multifunctional wall socket

A multifunctional wall socket related to electrical conduction connecting device is provided. In one embodiment, the socket comprises a socket cover with a conventional power connector, and a usb port arranged on the socket cover.
Winon Holding Company Limited

Multi-channel dual-mode digital control led driving circuit and led lamp

A multi-channel dual-mode digital control led driving circuit and an led lamp. The driving circuit comprises a current sampling module (10), a comparison and detection module (30), a digital control module (40) and a constant current control module (20).
Shenzhen Skyworth Semiconductor Design Center Co. Ltd

Method of manufacturing semiconductor devices by using sampling plans

A method of manufacturing semiconductor devices includes defining a sampling plan that contains position information about metrology sites on process wafers. A first property of the process wafers is measured to obtain measurement values at measurement points, wherein a quantity of the measurement points per process wafer is at least tenfold a quantity of the metrology sites.
Qoniac Gmbh

Multi-band heat flux gauge

A noncontact temperature sensing device receives radiative emissions from a sensed object to measure radiant heat flux and computes a temperature using multiple photodiode sensors, or elements, each sensitive to a different bandwidth of near ir light. The device samples a fluctuating heat source such as a flame or explosion at a fast sampling frequency, and compares corresponding or simultaneous readings in each bandwidth for computing a ratio of the respective bands and determining a temperature via ratio pyrometry.
Worcester Polytechnic Institute

Circuit for sampling current and system for sampling current of totem-pole bridgeless circuit

A circuit for sampling current includes a current transformer, a reset resistor, a diode, a sampling switch, and a current sampling resistor. The current transformer includes a primary winding and a secondary winding.
Hynetek Semiconductor Co., Ltd.

Silicon-controlled rectifier current-protection circuit, related operating method, and dimming circuit and lighting device containing the same

The present disclosure provides a silicon-controlled silicon (scr) current-protection circuit. The scr circuit includes an scr detection circuit and a protection circuit, a first terminal of the scr detection circuit being connected to a current sampling point on an output terminal of an scr device, a second terminal of the scr detection circuit being connected to a power conversion circuit, a third terminal of the scr detection circuit being connected to a first terminal of the protection circuit, and a second terminal of the protection being connected to the power conversion circuit.

System and switched power supply current sampling

According to an embodiment, a method of operating a switching power supply includes applying a periodic switching signal to a first switch that is coupled to an output node, detecting an offset delay between applying the periodic switching signal and a change in voltage of the output node, calculating a corrected midpoint of a half phase of the periodic switching signal based on the offset delay, generating a sampling pulse based on the corrected midpoint, and sampling a current at the output node according to the sampling pulse.. .

Photovoltaic combiner box monitoring system

A photovoltaic combiner box monitoring system includes a current sampling circuit, a microprocessor and a communication circuit; the current sampling circuit is connected with the microprocessor to sample at least one channel of current signals and input the sampled currents to the microprocessor; and the microprocessor is connected with the communication circuit to send the current signals sampled by the current sampling circuit by the communication circuit. Thus, the photovoltaic combiner box monitoring system can sample current signals from the photovoltaic combiner box by means of the current sampling circuit and send the sampled current signals through the communication circuit..
Beijing Boe Energy Technology Co., Ltd. Et Al

Asynchronous state estimation and control in a field-oriented control architecture

A motor controller architecture and method of operating the same. The motor controller asynchronously generates multiphase control signals for a multi-phase electric motor, relative to the estimation of various state parameters used in generating those control signals.
Texas Instruments Incorporated

Driving circuit and driving permanent magnet synchronous motor

A driving circuit of a pmsm can include a current sampling circuit configured to generate a current sampling signal by sampling a stator current information of one phase of the permanent magnet synchronous motor; a bemf circuit configured to receive the current sampling signal and a voltage sampling signal that represents a stator voltage of the phase, to estimate back electromotive force information of the phase, and to output a first voltage signal that represents the back electromotive force information; and a torque regulating circuit configured to generate an angle difference signal by calculating an angle difference between the first voltage signal and the current sampling signal, where the angle difference signal is configured to regulate an amplitude of a first u-shaped modulation wave such that a rotor current is in phase with the first u-shaped modulation wave for maximum torque per ampere.. .
Silergy Semiconductor Technology (hangzhou) Ltd

Control circuit and control switching power supply operating in quasi resonant mode

A control circuit can include: an output current sampling circuit configured to sample a current through a power switch of a switching power supply operating in a quasi-resonant mode, and to generate an output current feedback signal that represents an output current of the switching power supply; and a valley locking circuit configured to receive the output current feedback signal and a plurality of valley switching threshold voltages, where the valley locking circuit is switched to a corresponding valley from a valley currently being locked when the output current feedback signal is increased or reduced to one of the plurality of valley switching threshold voltages.. .
Silergy Semiconductor Technology (hangzhou) Ltd

Systems and methods to sample current measurements in energy storage devices

Systems and methods to sample current measurements in energy storage assets while reducing bias errors such as aliasing are provided. One example current sampling system includes an integrator circuit that receives the current signal as an input and integrates the current signal to output a charge signal.
General Electric Company

Voltage sense control circuit, voltage sense control driving circuit and driving permanent magnet synchronous motor

A driving circuit of a pmsm can include: a current sampling circuit that obtains a current sampling signal by sampling a rotor current of one phase of the pmsm; a sliding mode estimating circuit that receives the current sampling signal and a voltage sampling signal that represents a rotor voltage of the phase, estimates a back electromotive force information of the phase, and generates a first voltage signal that represents the back electromotive force information; a speed computing circuit that receives the first voltage signal, and generates an angular velocity signal that represents rotor cycle information; and a pwm control circuit that generates a pwm control signal according to the angular velocity signal, where the pwm control signal controls the turn on/off of switches in a three-phase inverter, to control an operating current of the pmsm to be a sine wave current.. .
Silergy Semiconductor Technology (hangzhou) Ltd

Voltage sense control circuit, voltage sense control method and isolated converter thereof

A voltage sense control circuit configured for an isolated converter can include: a current sampling and holding circuit configured to sample a current through a power switch to obtain a voltage sense signal that represents current information of the power switch, where the voltage sense signal is in proportion to a forward voltage drop of a rectifier device; a compensation signal generating circuit configured to generate a first current signal according to the voltage sense signal, and to generate a compensation signal according to the first current signal to compensate an output voltage feedback signal of the isolated converter to obtain a voltage feedback signal; and a voltage sampling and holding circuit configured to sample and hold the voltage feedback signal to regulate an output voltage of the isolated converter to be stable.. .
Silergy Semiconductor Technology (hangzhou) Ltd

Dimming circuit and dimming system suitable for scr dimmer circuit

The present disclosure provides a dimming circuit for scr dimmer (silicon-controlled rectifier) circuit. The dimming circuit includes a signal conversion circuit for converting an input signal to a sine-wave voltage signal and output the sine-wave voltage signal to a current sampling end of a power factor correction circuit.
Sengled Optoelectronics Co., Ltd

Control circuit, control method and flyback converter of primary-side feedback control thereof

The disclosure relates to a control circuit, a control method and a flyback converter of primary-side feedback control including the control circuit. On the basis of the current sampling signal feedback, the flyback converter of primary-side feedback control is controlled to operate in a constant on time mode when the input voltage is large, and is controlled to operate in a peak current mode when the input voltage is close to a valley.
Silergy Semiconductor Technology (hangzhou) Ltd.

Inverter phase current reconstruction apparatus and methods

Methods and apparatus are presented for sampling low side inverter phase currents, in which current sampling is selectively delayed in a given pwm cycle by a non-zero sampling delay time value from a nominal sample time if the middle pulse width value is less than a non-zero first threshold to facilitate adequate signal settling for accurate current measurement, and if a middle total continuous on-time near the end of the given pwm cycle is less than a non-zero second threshold, the middle total continuous on-time is selectively extended by adding a non-zero adjustment offset time value to a middle pulse width value for a next pwm cycle.. .
Rockwell Automation Technologies, Inc.

An electrical circuit and a measuring the power consumption of an led lighting device

Embodiments consistent with the present disclosure provide an electrical circuit and a method for measuring the power and power consumption of an led lighting device in real time. The circuit includes a controlling unit configured to process data; a display unit configured to display data received from the controlling unit and other components; a power supply and driving unit configured to supply power; an led light source; and a rf unit configured to send data to remote terminals.
Zhejiang Shenghui Lighting Co.,ltd

Gradient coil checking device and magnetic resonance imaging system

The present utility model provides a gradient coil detection device and an mri system. The gradient coil checking device for an mri system comprises: a voltage sampling circuit, comprising: a sample voltage input end, connected between a gradient power amplifier of the mri system and the gradient coil and obtaining a gradient coil sample voltage, and a sample voltage output end; a current sampling circuit, a sample current input end, connected to the gradient power amplifier of the mri system and obtaining a gradient coil sample current, and a sample current output end; a calculation unit, connected to the sample voltage output end and the sample current output end, and used for calculating a gradient coil calculated resistance according to the gradient coil sample voltage and the gradient coil sample current; a comparison unit, connected to the calculation unit, and used for comparing the gradient coil calculated resistance with a reference value to obtain a result signal.
Siemens Healthcare Gmbh

Regenerative braking controlling system and method

The regenerative braking controlling system includes an armature current sampling module, a calculating module, and an adjusting module. The calculating module includes a power calculating unit, an optimum phase angle calculating unit, an optimum regenerative current calculating unit, and a sub-optimum regenerative current calculating unit.

Method of current compensation based on division-sigma control for dc/dc converter

A method is provided for current compensation. The method is based on division-sigma (d-Σ) control for a dc/dc converter.
National Tsing Hua University

Current sampling circuit and method

Disclosed is a current sampling circuit including a proportional current output circuit and a full differential common mode negative feedback circuit, specifically the proportional current output circuit is configured to calculate a current output from a power device according to a preset proportion to obtain a first proportional current and a second proportional current, and to output the first proportional current and the second proportional current to the full differential common mode negative feedback circuit; and the full differential common mode negative feedback circuit is configured to shunt respectively the first proportional current and the second proportional current using a full differential common mode negative feedback network with a bias current in microamps to obtain a first sampling current and a second sampling current, and to output constantly the first sampling current and the second sampling current. Further disclosed is a current sampling method..

Power converter

A power converting circuit includes a converter. The converter receives and converts an input power to provide power for a load.
Delta Electronics, Inc.